DE19957990A1 - Winding core withdrawing device for textile winding machine has mandrel consisting of outer sleeve and inner shaft which has plate which locks against end of core and spring on sleeve which holds plate down while shaft is passing through - Google Patents

Abstract

The winding core (2) withdrawing device has a mandrel (4) which is inserted into the core. This consists of an outer sleeve (5) and an inner shaft (6). A plate (7) near the end of the shaft locks against the end of the core once the shaft has passed through it, allowing the core to be withdrawn. A spring (8) on the sleeve holds the plate down while the shaft is passing through the core.

Description

The invention relates to a pull-out device for handling rolls winding tubes used by means of an automatic work the cantilever manipulator.

When winding material webs, especially paper, cardboard or tissue webs, winding tubes are usually used, on which winding tubes be pushed. After the wrapping process, that is, if the one to be wrapped Has reached its final diameter and the winding roll itself out of the Roll winding machine has been moved out, the winding tube must be removed from the finished winding roll or the winding tube pulled out and Can be reused in a supply system. This will performed by a manipulator.

According to the known prior art, the winding tubes are are regularly longer than the working widths to be wrapped and are therefore an excess Stand over the roll widths, from the outside through positive or non-positive The gripper is gripped and pulled out of the winding tubes. When using The known gripping devices have shown that in addition to the nor paint wear on the winding tubes in their end areas on the Gripper also the usual rough operation in paper, cardboard or tissue briken caused a relatively short life of these winding tubes. It follows that the desired automation of the winding process is greatly affected by disturbances from the aforementioned area. It is also to consider that due to the voluminous winding material, the winding duration for a winding roll is relatively short, so that the wear-resistant  sive changes for the winding tube are often pending for each winding process. By the positive or non-positive grip of the protruding winding tube is a direct relationship between the outer shape of the winding tube and the Shape of the gripper required. This means that for different wraps tube diameter also different grippers, but at least to the shape of the adaptable grippers are required. The usage of winding tubes, the tube different from winding order to winding order can have a diameter is due to the fact that the following Processor of the finished winding rolls the diameter of the winding used sleeves determined.

A disadvantage of these gripping devices described above is that they are due to the different winding diameters are designed quite complex and in operational practice is not always satisfied for the aforementioned reasons work as a position, because on the one hand the universal application is missing and on on the other hand, the susceptibility to faults is very high.

The closest prior art to the present invention is in US Pat to find German patent specification DE 36 01 637 C1. It reveals an out pulling device according to the preamble of claim 1, wherein the mani pulator is designed as a pull-out mandrel and inserting it into the winding tube baren, in two parts in the longitudinal extent of the shaft, the shaft end is mounted eccentrically rotatable about the longitudinal axis.

By turning the shaft end by 180 ° using a cylinder a head bolt and a pinion existing drive becomes an eccentric protruding part of the foot area behind the winding tube insert of the winding tube pivoted, whereby the winding tube in the event of axial displacement of the handle is pulled out of a winding tube carrying the finished winding roll.

The disclosed pull-out device has the serious disadvantage that the winding tube insert of the winding tube through the protruding part of the foot area is applied unevenly on its circumference. As a consequence, that there is only a one-sided force attack on the winding tube insert, which, in the worst case, results in jamming of the pull-out device device and thus result in loss of functional reliability.  

It is therefore an object of the invention to provide a pull-out device of the type mentioned create a simpler and more robust manipulation of the winding tubes with improved operational safety and lower investment costs.

According to the invention, this object is achieved with a device of the aforementioned type solved in that the manipulator is designed as an extraction mandrel and out a shaft that can be inserted into the winding tube (outer sleeve, inner shaft) stands, the inner shaft is rotatably mounted about the longitudinal axis and in Area of the shaft end is provided with a tension washer and the Ver outer sleeve in the area of the sleeve end with at least two spring clips can be seen from the in the area of the shaft end of the inner shaft brought tension washer by rotating the inner shaft in the radial direction are acted upon. With this configuration of the pull-out device, it becomes it is sufficient that the winding tube insert of the winding tube through the spring clip is the same moderate, preferably symmetrical, is applied to its circumference and thus a deadlock due to a one-sided force attack entirely is avoided, that is, the operational safety is noticeably increased.

In a further embodiment of the invention it is provided that the clamping disc has a radial outer contour, by means of which the spring clip is applied is beatable. The radial outer contour preferably has at least a reduced radial distance (= "retracted position") with a circumferential area a radial increasing in the opposite direction of rotation of the inner shaft distance, which is ultimately in the functional radial distance (= "clamping position") transforms.

This makes it possible to opti the three operating positions of the spring clip to control painterly: during the retracted position, the spring clip is on the Outer contour with reduced radial distance during the transfer from from the retracted position to the clamping position, it moves along the outer contour with increasing radial distance (against the direction of rotation of the inner Shaft) and during the clamping position it is ultimately due to the outer contour with functional radial distance.  

With regard to a "gentle" transfer of the spring clip from the retracted position for the clamping position, it proves to be advantageous if the counter rotation direction increasing radial distance the shape of a circular arc or the same.

Due to the fact that the tension washer is a "classic" wear part of the extractor, it is advantageous if it is on the inner shaft by means of at least one key or by means of a press fit and min at least one securing element is attached to prevent rotation. This will make a simple and quick replacement of the same with a new clamping disc allows. The press fit preferably has a cylindrical one or a tapered contour and the securing element is one by default Grub screw.

In a further embodiment of the invention it is provided that the rotatable Shaft end of the inner shaft is a truncated cone, in which the smaller head surface is formed as an insertion tip. This has the advantage that the rotatable shaft end a more or less self-centering outer contour has and the insertion of the mandrel into the winding tube further through the Insertion tip is made considerably easier.

In a further advantageous embodiment of the invention, it is provided that the spring clip is made of spring steel, preferably of CK75G, with a hardness of 47 ± 3 HRC and a strength of 1,200 to 2,000 N / mm ² , preferably of 1,570 to 1,760 N / mm ² , exists because spring steels are due to their properties with regard to strength, area of use and the like entirely suitable for this application and also bring cost advantages.

With regard to design aspects, it is advantageous if the spring clip in one screwed to the outer sleeve longitudinal groove and axially by means of at least one spring pin is secured. This type of attachment costs moderate advantages and is, as already mentioned, structurally advantageous because  due to this type of attachment neither strength-related nor dimensional disadvantages have to be accepted.

Since after pulling out the winding tube from the winding tube using the Manipulator must be the winding tube after the final removal at the latest pull it out of the winding tube alone from the handle and in particular must be carried by the outer sleeve, it shows stability and for safety reasons at least 1½ times the length of their diameter, the diameter being only slightly smaller than the inside diameter of the Winding tube is in its end region.

To ensure the greatest possible drive safety of the manipulator , the inner shaft is rotated via a at the beginning of the shaft attached spur gear that with a driven and a stroke back circular rack is in operative connection. This drive system draw net also by a great reliability, combined with low In investment and operating costs.

The stroke of the round rack is in a further embodiment of the invention at least one adjusting screw can be limited. This ensures that the pull-out pin only in the event of a possible malfunction of the drive system the least possible damage is caused.

It is understood that the above and to be explained below terenden features of the invention not only in the combination specified tion, but can also be used in other combinations or alone are without departing from the scope of the invention.

Further features and advantages of the invention result from the Unteran say and the following description of a preferred embodiment example with reference to the drawing.  

Show it

Figure 1 is a sectional side view of an advantageous embodiment form of the pull-out device according to the invention in the retracted tube in a state ("clamping position");

Figure 2 is a plan view of the sleeve end of the outer sleeve including spring clip.

Fig. 3a seen the extractor of the extractor of Figure 1, in the axial direction of the winding tube ("retracted position");

Fig. 3b the pulling mandrel of the pulling device according to Fig 1, seen in the axial direction of the winding tube ("clamping position");

Fig. 4 seen the extractor of FIG. 1, in the axial direction of the winding tube.

The handle of the extraction device 1 illustrated in Fig. 1 consists of a Ausziehdorn 4 and its drive 18. The pull-out mandrel 4 is composed of an outer sleeve 5 with a sleeve end 5.1 and an inner shaft 6 mounted therein with a shaft end 6.1 and a shaft start 6.2 . in Fig. 1 it is inserted into a winding tube 22 carrying an indicated winding roll 21 .

The inner shaft 6 is rotatably supported about the longitudinal axis LA and is provided with a tensioning disk 7 in the area of the shaft end 6.1 . The tensioning disk 7 , as can be seen in FIGS . 3a and 3b, has a radial outer contour 9 , by means of which the spring clips 8 can be acted upon. Furthermore, the clamping disc 7 is brought against rotation on the inner shaft 6 by means of a feather key 10 ; it can also be non-rotatably attached in a manner not shown by means of a press fit and at least one securing element, the press fit having a cylindrical or a conical contour and the securing element can be a grub screw. The rotatable shaft end 6.1 of the inner shaft 6 in FIG. 1 is a truncated cone 11 , in which the smaller head surface 12 is designed as an insertion tip 13 .

The outer sleeve 5 is provided in the area of the sleeve end 5.1 with a total of four sym metrically distributed on the circumference U spring clips 8 , which can be struck by the clamping disk 7 attached in the area of the shaft end 6.1 of the inner shaft 6 . The spring clips 8 are, as shown in FIG. 2 for a spring clip 8 , screwed into a longitudinal groove 14 attached to the outer sleeve 5 and secured axially by means of a spring pin 15 . The spring clips 8 are made of spring steel, preferably of CK75G, with a hardness of 47 ± 3 HRC and a strength of 1,200 to 2,000 N / mm ² , preferably of 1,570 to 1,760 N / mm ² . Furthermore, the outer sleeve 5 has at least 1½ times the length L of its diameter D _A , the diameter D _{A being} only slightly smaller than the clear diameter D _{L of} the winding tube 2 in its end region 2.1 .

FIGS. 3a and 3b show the Ausziehdorn 4 of the drawing device 1 according to Fig. 1, seen in the axial direction of the winding tube 2, both in the "retracted position" and in the "clamping" position. It is clear that the radial outer contour 9 in four peripheral areas UB a reduced radial R _V distance having an opposite direction of rotation DR of the inner shaft 6 increasing radial distance R _G, which ultimately passes into the functional radial distance R _F. the opposite direction of rotation DR increasing radial distance R _G further has the shape of a circular arc KB; however, other shapes that produce a smooth transition between the different radii can also be realized.

The drive 18 shown in FIG. 4 of the pull-out device 1 consists essentially of a cylinder 19 , a piston pin in the form of a round toothed rack 17 and a spur gear 16 which is placed at the start of the shaft 6.2 of the inner shaft 6 . The application of the round rack 17 by any medium, such as air or oil, is possible. By this drive 18 is shown, the inner shaft 6 together with the chuck-provided pulley 7 by a selectable angle, for example 70 degrees with four spring clips 8, rotatable about the longitudinal axis LA. In this way, the spring clips are transferred into a clamping position against the winding tube insert 2.2 of the winding tube 2, 8, whereby in the axial Ver the handle the finished wound roll shift the winding tube 2, not shown, from a 21 carrying winding core is pulled out 22nd Furthermore, it can be seen that the stroke H of the round rack 17 can be limited by an adjusting screw 20 which engages in a groove provided on the round rack 17 . The drive 18 of the pull-out device 1 is not only limited to the embodiment shown, it can also be designed, for example, as a direct-acting electric motor or as a chain drive.

In summary, it should be noted that the invention provides a pull-out direction of the type mentioned is created by which a simpler and more robust manipulation of the winding tubes with improved operational safety and lower investment costs.  

Reference list

1

Pull-out device

2nd

Winding tube

2.1

end

2.2

Winding tube insert

3rd

manipulator

4th

Extractor

5

Outer sleeve

5.1

Sleeve end

6

Inner shaft

6.1

Shaft end

6.2

Beginning of shaft

7

Spring washer

8th

Spring clip

9

Radial outer contour

10th

Adjusting spring

11

Truncated cone

12th

Head area

13

Insertion tip

14

Longitudinal groove

15

Spring pin

16

Spur gear

17th

Round rack

18th

drive

19th

cylinder

20th

Adjusting screw

21

Winding roll

22

Winding tube
DR direction of rotation
D _A

diameter
D _L

Lights diameter
H stroke
KB circular arc
L length
LA longitudinal axis
R _F

Functional radial distance (= "clamping position")
R _G

Increasing radial distance
R _V

Reduced radial distance (= "retracted position")
U scope
UB circumferential area

Claims (12)

1. pull-out device ( 1 ) for handling winding tubes ( 2 ) placed in roll winding machines by means of an automatically operating, freely projecting manipulator ( 3 ), characterized in that
the manipulator ( 3 ) is designed as a pull-out mandrel ( 4 ) and consists of a shaft (outer sleeve ( 5 ), inner shaft ( 6 )) that can be inserted into the winding tube ( 2 ),
wherein the inner shaft ( 6 ) is mounted rotatably about the longitudinal axis (LA) and is provided with a tensioning disk ( 7 ) in the region of the shaft end ( 6.1 ) and
wherein the outer sleeve ( 5 ) in the area of the sleeve end ( 5.1 ) is provided with at least two spring clips ( 8 ) which are attached to the tensioning disk ( 7 ) in the area of the shaft end ( 6.1 ) of the inner shaft ( 6 ) by rotating the inner one Shaft ( 6 ) can be loaded in the radial direction. 2. pull-out device ( 1 ) according to claim 1, characterized in that the clamping disc ( 7 ) has a radial outer contour ( 9 ), by means of which the spring clip ( 8 ) can be acted upon. 3. Extracting device ( 1 ) according to claim 2, characterized in that the radial outer contour ( 9 ) in at least one peripheral region (UB) has a reduced radial distance (R _V ) (= "retracted position") with a counter to the direction of rotation (DR) of the inner Shaft ( 6 ) has increasing radial distance (R _G ), which ultimately stood in the functional Radialab (R _F ) (= "clamping position"). 4. Pulling device ( 1 ) according to claim 3, characterized in that the radial distance (R _G ), which increases in the opposite direction of rotation (DR), has the shape of a circular arc (KB) or the like. 5. Pulling device ( 1 ) according to any one of the preceding claims, characterized in that the clamping disk ( 7 ) on the inner shaft ( 6 ) by means of at least one feather key ( 10 ) or by means of a press fit and at least one securing element is attached against rotation. 6. Pulling device ( 1 ) according to claim 5, characterized in that the press fit has a cylindrical or a conical contour and the securing element is a grub screw. 7. extracting device ( 1 ) according to any one of the preceding claims, characterized in that the rotatable shaft end ( 6.1 ) of the inner shaft ( 6 ) is a truncated cone ( 11 ) in which the smaller head surface ( 12 ) is designed as an insertion tip ( 13 ) is. 8. Pulling device ( 1 ) according to one of the preceding claims, characterized in that the spring clip ( 7 ) made of spring steel, preferably of CK75G, with a hardness of 47 ± 3 HRC and a strength of 1,200 to 2,000 N / mm ² , preferably from 1,570 to 1,760 N / mm ² . 9. Pull-out device ( 1 ) according to one of the preceding claims, characterized in that the spring clips ( 7 ) are screwed into a longitudinal groove ( 14 ) attached to the outer sleeve ( 5 ) and are secured axially by means of at least one spring pin ( 15 ). 10. Pulling device ( 1 ) according to one of the preceding claims, characterized in that the outer sleeve ( 5 ) has at least 1½ times the length (L) of its diameter (D _A ), the diameter (D _A ) being only slightly smaller than the inside diameter (D _L ) of the winding tube ( 2 ) in its end region ( 2.1 ). 11. Pulling device ( 1 ) according to one of the preceding claims, characterized in that the rotation of the inner shaft ( 6 ) via a spur gear ( 16 ) attached to the shaft start ( 6.2 ), that with a driven and a stroke (H) covering a round rack ( 17 ) is operatively connected. 12. Pull-out device ( 1 ) according to one of the preceding claims, characterized in that the stroke (H) of the round rack ( 17 ) can be limited by means of at least one adjusting screw ( 18 ).